A system designed to remove components of a diesel engine’s emissions control system, often resulting in increased horsepower and torque, constitutes the core focus of this discussion. These systems typically eliminate the diesel particulate filter (DPF), diesel oxidation catalyst (DOC), and selective catalytic reduction (SCR) systems. For example, a modified exhaust system may replace the factory exhaust, allowing for increased flow and reduced backpressure.
The motivation behind employing such a system can stem from a desire for improved engine performance and fuel economy, though these gains often come at the expense of regulatory compliance and environmental considerations. Historically, these modifications gained traction among those prioritizing raw power and off-road capabilities. However, regulations are increasingly restricting the use of these systems on vehicles operated on public roads due to their impact on air quality.
